Nerve Ethmoidal Posterior

The posterior ethmoidal nerve (lat. n. ethmoidalis posterior, pna, bna; n. ethmoideus posterior, jna) is one of the branches of the trigeminal nerve.

The posterior ethmoidal nerve arises from the ophthalmic branch of the trigeminal nerve, passes through the posterior ethmoidal fossa into the nasal cavity and innervates the mucous membrane of the posterior cells of the ethmoid bone and the posterior end of the superior turbinate.

Also, the posterior ethmoidal nerve is involved in the innervation of the mucous membrane of the upper nasal passage and the anterior part of the maxillary sinus.

The posterior ethmoidal nerve is the third of the cranial nerves and the seventh nerve in the cranium. It enters the base of the skull through a large foramen in the sphenoid bone. Does it go up - into the cranial cavity, or down?

The question of where this nerve goes is very important. After all, the inferior part of the brain, like its other parts, needs to exchange with the environment. It turns out that the skull simply cannot conduct the nerve impulse further, without crushing small branch cells. He gives them to help the membranes of the brain and further throughout the body. It is the branches coming out of the nose that supply the mucous membrane. This is where reflex excitation settles at the nerve endings. Next, inhibition begins in the nasal sinuses and block in the area of ​​the chiasm and retina. Or vice versa, reverse processions occur in the cerebral cortex, and the memory of the past situation, like body memory, also causes a sharp inhibition of emotions,